Latch.



R. SGHOELL.

LATCH.

APPLICATION FILED AUG. 15. I916.

Patented Jan. 9, 1917 2 SHEETS-SHEET 1.

gay/555.5;

v R. ASCHOELL.

LATCH.

APPLICATION FILED Aue.15. 191s.

1,2121. 17. Patented Jan. 9, 1917.

' 2 SHEETS-SHEET 2.

TTNTT D STAT REINHOLD SCHOELL, OF STAMFORD, CONNECTICUT, ASSIGNOB TO THE YALE & TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

Lemon.

. Specification of Letters Patent.

Patented Jan. 9, 13.91%.

Application filed August 15, 1916. Serial No. 114.,987.

To all whom it may concern:

Be it known that I, REINHOLD SCHOELL, a citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Latches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in latches having double throw bolts and is designed particularly as an improvement on the construction disclosed in Patent 1,191,539 granted to me July 18th, 1916.

The object of the invention is to provide improved means for holding the bolt in its single throw position, which means are released to permit of the full throw of the bolt, by the inward movement of the bolt and deadlocking slide during the closing movement of the door.

A further object is to provide improved means for locking the deadlocking slide against movement independently of the bolt when the latter is in its single throw position. Y

With these objects in view my invention consists in the details of construction as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view partly in section and partly in elevation of my improved latch, the cover plate being removed, and the bolt projected to double throw position and deadlocked.

Fig. 2 is a view showing the position of the latch bolt projected to its first throw position. Fig. 3 is a view in section through Fig. 2, showing the easy latching bevel of the bolt. Fig. 4 is a view similar to Fig. 2, showing the bolt retracted. Fig. 5 is a view of the holding lever, and Fig. 6 a view of the deadlocking slide.

The improvement is shown in connection with a mortise lock or latch, the bolt of which is adapted to be actuated by a key and also by-knobs, but I would have it understood that I do not confine myself to the details of the mechanism shown except the bolt and the parts which coact therewith to produce the results that will be described.

The lever 7 is pivoted to the lock casing and 1s normally held by a spring 7*, in position tobe engaged by the cam 8 actuated by the knob spindle 9, and also by the cam of a pin tumbler look not shown, and is provided with a laterally projecting pin 10, adapted to engage the deadlocking lever 11 at the rear of its pivot 12, so that when the latch lever 7 is moved by either the key or knob mechanism, the pin 10 engaging the lever 11 Wlll elevate the rear end and depress the front end of said lever and remove the front end from the path of travel of the bolt and permit the latter to be retracted. The latch lever 7 rests in front of the cross bar 13 at the rear end of the tail 14 of the bolt 15, hence when moved rearwardly either by the key lock or knob mechanism it will retract the b0lt, which is normally projected by the sprmg 16.

Journaled on pin 12 which supports the deadlocklngle-verll, is the bolt holding lever 17, provided on its upper edge with two shoulders 18 and 19, the shoulder 19 being in advance of shoulder 18 and in a higher plane. This lever 17 is also provided at its rear end with an upwardly projecting stop or block 20, which, as will be hereinafter explamed prevents the independent inward movement of the deadlocking slide when the bolt is in its single throw position.

The bolt 15 is mounted in the usual manner, with the cross head or bar 13 on the tail thereof adjacent to the stepped edge of the lever 17. This lever 17 is yieldingly held in contact with cross head 13 by a spring 17, and is provided adjacent its rear end with a disk shaped roller 21, which operates by its engagement with the lower edge of the cross head 13 as the latter moves rearwardly, to depress the rear free end of lever 17 in order to permit said cross head to clear the shoulder 18 and thus allow the bolt to move to its fully projected or double throw position.

' The bolt after having been retracted by the knobs or a key, normally stands in its single throw position as shown in Fig. 2, with its cross head in contact with shoulder 18 of lever 17, and when in this position, if it be moved inwardly, the cross head 13 engages roller 21 and depresses the free end of the lever, but the instant the bolt is released, and the cross head leaves the roller, the lever 17 rises to a position where its shoulder blocks further forward movement of the bolt, hence in order to permit of the full or double throw of the bolt, automatic means must be provided for holding shoulder 18 out of the path of movement of the cross head on the tail of the bolt, after the latter has been forced inwardly by contact with the strike plate or keeper. This means 1s shown detached in Fig. 6 and comprises a fiat plate 22 having a head 22 to which the tail iece 23 is secured. These parts, WhlCl] will e hereinafter referred to as the deadlocking slide, are mounted in the; lock case at one side of the bolt as shown in F igs. 1 and 3, with the part 22 thereof in contact with the side face of the bolt and passing through the front of the lock. This part or plate 22 is wider than the bolt so as to prevent it from entering the bolt opening in the strike plate or keeper, and the head 22, which is at right angles to the plate 22 rests in rear of the bolt 15 and normally in contact therewith, so that when the bolt is re tracted the deadlocking slide will also be retracted.

The tail piece 23 is encircled by a spring 24 which tends to hold the head 22 of the deadlocking slide against the rear end of the bolt.

When the bolt is in its normal or single throw position the stop 20 on lever 17, rests up in the path of movement of the tail piece 23 of the deadlocking slide and blocks any independent rearward movement of the said slide. If however, the bolt be pushed or pulled inwardly, the rearward movement of the cross head 13, by its engagement with the roller 21, depresses the free end of lever 17 thus carrying the stop 20 down and out of the path of movement of the tail piece of the dead locking slide and permitting the latter to move inwardly with the bolt. If as before explained the bolt be retracted and released when the door is open, the shoulder 19 on lever 17 engages the cross head on the bolt when the latter reaches its first or single throw position and thus prevents the bolt from being projected to its double throw position while the door is open. If the door be closed, the contact of the bevel of the bolt with the keeper, forces the bolt and deadlocking slide rearwardly, and when the door reaches its closed position the bolt is free to shoot into the bolt opening. There is no opening in the keeper for the deadlocking slide, hence when the door is closed, the slide will be held retracted and when in such position, the rear end of its tail piece rests in the path of movement of stop 20 on lever 17 and holds said lever down with its shoulder 19 out of the path of the cross head 13, thus permitting the cross head and consequently the bolt to move forwardly until the cross head contacts with the shoulder 18, and when in this position the bolt is fully projected or in its double throw position; and when in this position is deadlocked by the lever 11.

When the bolt is in its first or single throw position as shown in Fig. 2, the front end of lever 11 rests against the underside of the bolt, and is held thereagainst by its spring 25. As the bolt moves from its normal position, Fig. 2, to its double throw position, Fig. 1, its rear end passes the front end of deadlocking lever and thus permits the latter to move up into the path of movement of the bolt and deadlock the same.

The bolt when double thrown may be retracted by the knobs or key mechanism acting on the latch lever 7. As this lever is moved to retract the bolt the pin '10 thereon engages the rear end of deadlocking lever 11 and moves the latter in a direction to carry its free end out of the path of movement of the bolt, thus permitting the continued movement of the lever 7 to retract the bolt. When the bolt is released the deadlocking slide moves forwardly with it and releases the lever 17 just prior to the time the bolt reaches its first throw position, thus enabling the shoulder 19 on lever 17 to rise in front of cross head 13 and prevent the latter and connected bolt from moving outwardly beyond its first throw position. If the bolt should be pushed inwardly while the door is open and then be released, it would, if the deadlocking slide were held against outward movement, be projected its full or double throw and be deadlocked by the lever 11, but upon the release of the deadlocking slide the head 22 thereof in its outward movement will engage the upturned end of the lever 11 and move it downwardly and out of the path of the bolt thus leaving the latter free to be drawn back to first throw position by pressure of the finger against the same or by manipulating the knob or key mechanism.

The deadlocking slide cannot be pushed in to release the bolt when the door is open, and the bolt in its single throw position except when pushed back by the bolt, hence the bolt cannot be deadlocked when the door is open except by pushing in the bolt and then releasing the bolt and holding the deadlocking slide in its retracted position until the bolt has been fully projected, and if this should occur, the deadlock will be removed instantly by the release of the deadlocking slide as above explained.

It is evident that many slight changes might be resorted to in the relative arrangements of parts shown and described without departing from the spirit and scope of my invention. Hence I would have it understood that I do not restrict myself to the exact construction and arrangement of parts shown and described, but,-

Having fully described my invention what I claim as new and desire to secure by LettersPatent, is

1. In a lock, the combination of a double throw bolt having a tail piece, projecting the bolt, a lever having means to engage a projection on the tail piece for holding the bolt in its partly projectedposition and a slide actuated by contact with the strike plate of the lock for holding the lever out of contact with the projection on the tail piece of the bolt so as to permit the latter to be fully projected. a 2. In a lock, the combination of a double throw bolt having a tail piece, a spring for projecting the bolt, a lever having a shoulder to engage a projection on the tail piece for holding the bolt in its partly projected position, the tail piece having means for moving projection as the bolt is moved 'to its retracted position, and a slide actuated by contact with the strike plate ofthe lock for holding the said lever out of the path of movement of the projection on the tail piece ected.

3. In a lock, the combination of a bolt having a tail piece, a spring for projecting the bolt, a spring pressed pivoted lever engaging a projection on the tail piece of the bolt for holding the bolt in a partly projected position, means actuated by the inward movement of the bolt for disengaging the said lever and projection on the tail piece, and an independent device actuated by the inward movement of the bolt for holding the said lever out of the path of the said projection so as to permit the bolt to move to fully projected position.

4. In a lock, the combination of a double soas to permit the bolt to be fully prothrow bolt, a spring for projecting the same,

a lever having a shoulder to engage a projection on the tail piece of the bolt for holding the bolt in its partly projected position, the said lever also having a stop, and a slide actuated by contact with the a spring for the lever out of the path of-said strike plate or keeper and engaging the stop on the lever for holding the latter out of the path of the projection on the tail piece so as to permit the said stop normally resting in the path of the slide for preventing rearward movement of the latter when the bolt is-partly projected.

5. In a lock, the combination of a spring actuated bolt having a tail piece, a pivoted lever having a shoulder to engage a projection on said tail piece for holding the bolt in its partly projected position, the construction being such that the inward movement of the-tail piece turns the pivoted lever and moves the shoulder thereon out of the path of the projection on the tail piece, and a slide movable rearwardly with the bolt and engaging and holding the lever against movement thereby permitting the bolt to move to double throw position.

6. In a lock, the combination of a double throw bolt having a tail piece, spring actuated means engaging a projection on the tail piece for holding the bolt in its partly projected position and a slide movable rearwardly with the bolt and adapted to engage the spring actuated holding means and pre vent its re'ngagement with the bolt during the forward movement of the latter.

7. In a lock, the combination with a double throw spring actuated bolt having a tail piece, means engaging a projection on the tail piece for holding the bolt in its partly projected position, means for engaging said holding means after the latter has been disengaged from the projection on the tail piece for holding it out of the path of movement of the said projection so as to permit the bolt to be fully projected, and a lever for deadlocking the bolt when fully projected the said deadlocking lever being actuated to release the bolt by the knob or key actuated mechanism of the look.

In testimony whereof, I have signed this specification inthe presence of two subscribing witnesses.

REINHOLD SCHOELL. Witnesses MORTIMER M. MEAD, CHARLES A. BERRY.

the bolt to be fully projected, 

